If you’ve ever wanted a movie to grab you by the ears, scream directly into your brain, and then smear alien slime on your sense of logic, Cuckoo is absolutely your weird little prize hen.
Tilman Singer’s second feature is the rare horror film that doesn’t just step off the rails, it builds entirely new ones out of raw vibes and German Alpine anxiety. It’s part reproductive horror, part sci-fi conspiracy, part coming-of-age story about a girl realizing her little sister is technically an alien bird parasite—and somehow it works. Mostly because everyone involved commits like their lives (and internal organs) depend on it.
Welcome to the Alps, Please Ignore the Screaming
Our heroine Gretchen (Hunter Schafer) is already not having a great time. Her mother’s dead, she’s been uprooted to a tourist town in the Bavarian Alps with her dad Luis (Marton Csokas), chipper stepmom Beth (Jessica Henwick), and mute half-sister Alma. They’re here to help develop a new ultra-modern resort built around a decrepit mountain lodge, owned by Herr König (Dan Stevens), who radiates “this guy absolutely has a basement lab” energy from the second he appears.
On the surface, it’s all glass, pine, and tasteful Euro-design. Underneath, it’s a lovingly curated nightmare:
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Guests randomly vomiting.
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Alma having seizures triggered by a mysterious piercing shriek.
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A hooded woman stalking the woods like a discount Ring wraith with better posture.
Gretchen, being the only person in the film with functioning pattern recognition, is understandably unsettled. Everyone else just vibes in that very specific horror-movie way where you’d rather believe in food poisoning than admit something is deeply cursed.
Hunter Schafer: Scream Queen in Training
Schafer is the anchor in this beautifully chaotic storm. Critics have praised her as the film’s emotional core, and for good reason—she sells Gretchen’s cocktail of grief, anger, and “what the hell is happening” with physical and emotional intensity.
Gretchen isn’t a passive final girl waiting for the plot to rescue her. She:
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Investigates on her own.
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Bonds with Alma in genuinely sweet ways.
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Flirts and dreams about escape with a cool guest named Ed.
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Carries a butterfly knife like an anxiety emotional support pet.
By the time she’s sprinting through hospitals, stabbing corrupt authority figures, and bargaining with an inhuman mother over the fate of her maybe-not-entirely-human sister, you’re fully on her side—even when the narrative takes a sharp left turn into “bird-people inseminate humans with slime.”
Dan Stevens, Weaponized Camp
If there were awards for “Most Unsettling Use of Niceness,” Dan Stevens would already have one on his mantel. As Herr König, he gives a performance critics have called both hilarious and sadistic, a sort of Eurotrash Dr. Moreau who’s discovered brood parasitism and thought, yes, but what if timeshares?
He smiles too much. He’s generous in all the wrong ways. He uses a flute to summon adolescent alien teenagers like it’s the worst kids’ club activity ever invented. Every choice Stevens makes doubles as lampoon and threat; he’s one of those villains who makes you laugh right up until you remember he is absolutely planning to turn someone’s uterus into a wildlife preserve.
König’s “explanation” scene—where he gently lectures Gretchen on cuckoo birds, brood parasitism, and the miracle of implanting your monstrous offspring in unsuspecting human surrogates—is equal parts science lesson and HR meeting for an eldritch daycare.
Brood Parasites, But Make It Family Drama
The central conceit is gloriously deranged: there’s a near-human species living among us that breeds like cuckoo birds, implanting their offspring in human hosts. Those young—like Alma—grow up in human families until they’re ready to join their “real” parents, guided by biologically weaponized shrieks that double as sonic crowd control.
In another movie, this would be treated as pure body horror. Cuckoo does something more interesting (and more emotionally cruel): it plays it as a twisted custody battle. Gretchen’s desperate attempts to protect Alma aren’t just about survival; they’re about insisting that love and shared history matter more than biology—alien or otherwise.
By the time she’s literally putting a knife to Alma’s neck to scare off the hooded mother, then apologizing and thanking Alma for the voicemail she once sent to their human mom, the film has quietly pivoted from “girl vs. monsters” to “sister vs. universe.” Several critics have argued that beneath the chaos, this is really a story about sibling love helping someone become who they want to be despite all the horror around them, and that tracks.
It just happens to make that point with parasitic slime and ruptured eardrums.
Tilman Singer: In It for the Weird
Singer is absolutely not chasing “elevated horror respectability” here. He wants the film to feel like a freak-out: dense with symbolism, dripping with style, and only intermittently interested in linear logic. Reviews have called Cuckoo“unapologetically berserk,” “a surreal descent into weirdness,” and “zany” in exactly the way that makes some viewers glow and others reach for Advil.
The plot, strictly speaking, is… present. But Singer clearly cares more about:
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disorienting sound design (those shrieks are weaponized ASMR from hell),
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wide, off-kilter Alpine compositions,
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neon splashes in sterile resort corridors,
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and the general sensation of waking up from a nightmare you mostly understood… until the last five minutes.
If you need every piece of mythology footnoted, this will drive you round the bend. If you’re happy to understand just enough to feel uneasy, it’s a blast.
Sound, Style, and Screams
One thing almost everyone agrees on: Cuckoo sounds fantastic. The titular shrieks are used sparingly but devastatingly—part jump scare, part plot device, part metaphor for the way patriarchal and institutional power just short-circuits your brain when you’re trying to think.
The hotel itself feels like something out of a cursed Ikea catalog: all clean lines and glass with something feral humming underneath. Shot on 35mm in North Rhine-Westphalia, the film has that slightly grainy, tactile texture that makes the surrealism more grounded—and the body horror more unpleasant.
When Gretchen gets mauled by the car crash, limps around with a bandaged head, and stumbles through König’s pool house and the hospital’s fluorescent purgatory, you feel the bruises. This isn’t weightless, glossy Netflix horror; it’s scrappy, sweaty Euro-genre cinema that wants you to smell the chlorine and antiseptic.
Messy? Absolutely. Boring? Never.
The film isn’t perfect. Even some positive reviews admit it occasionally “careens off the rails” and that not all of Singer’s ideas are fully polished. There are exposition dumps that feel like they escaped from a different movie, and a few characters—like Henry, the disgraced detective—swing wildly between grounded and cartoonish depending on what the scene needs.
But honestly? That’s half the charm. Cuckoo would be far less fun if it behaved itself. The rough edges give it personality; the tonal whiplash keeps you awake. It’s the horror equivalent of that unhinged friend who tells stories out of order but somehow ends up making your night.
Critically, it’s landed in the “generally favorable” camp—around low-60s on Metacritic, high-70s on Rotten Tomatoes—and that feels right. It’s not for everyone, but for people who like their genre cinema ambitious, playful, and a little bit deranged, it’s catnip. Or, well… birdseed.
Final Verdict: Go Cuckoo
Cuckoo is the rare horror film that feels both lovingly crafted and completely unhousebroken. It doesn’t just nod at its influences; it chews them up and spits them back out as shrieking, slime-coated nightmare birds.
You get:
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Hunter Schafer proving she’s a horror star in the making.
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Dan Stevens gleefully dancing on the line between camp and menace.
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A bizarre, oddly touching sister story buried under sci-fi body horror.
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Alpine aesthetics and sound design that slap.
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And a finale where a tiny, mute girl blows out the eardrums of two armed men so she and her sister can steal a getaway car with their maybe-girlfriend.
Is it coherent? Not always. Is it safe, predictable, or boring? Absolutely not.
If you like your horror slightly unhinged but secretly heartfelt, Cuckoo is well worth letting into your nest—even if you do come away wondering what exactly just hatched in your brain.
